NOTE: The instances returned by this method
pre-allocate a full array of length
numHits.

Parameters:

sort - the sort criteria (SortFields).

numHits - the number of results to collect.

fillFields - specifies whether the actual field values should be returned on
the results (FieldDoc).

trackDocScores - specifies whether document scores should be tracked and set on the
results. Note that if set to false, then the results' scores will
be set to Float.NaN. Setting this to true affects performance, as
it incurs the score computation on each competitive result.
Therefore if document scores are not required by the application,
it is recommended to set it to false.

trackMaxScore - specifies whether the query's maxScore should be tracked and set
on the resulting TopDocs. Note that if set to false,
TopDocs.getMaxScore() returns Float.NaN. Setting this to
true affects performance as it incurs the score computation on
each result. Also, setting this true automatically sets
trackDocScores to true as well.

newTopDocs

Returns a TopDocs instance containing the given results. If
results is null it means there are no results to return,
either because there were 0 calls to collect() or because the arguments to
topDocs were invalid.

acceptsDocsOutOfOrder

Return true if this collector does not
require the matching docIDs to be delivered in int sort
order (smallest to largest) to Collector.collect(int).

Most Lucene Query implementations will visit
matching docIDs in order. However, some queries
(currently limited to certain cases of BooleanQuery) can achieve faster searching if the
Collector allows them to deliver the
docIDs out of order.

Many collectors don't mind getting docIDs out of
order, so it's important to return true
here.